Question

6gm of glucose is mixed with water to prepare 100gm solution of density 1.2gm/ml. Calculate the w/v % of the solution ?

Answer 1

w/v %=(wt. of solute/vol. of solution)*100
here,
 wt. of solute=6 gm
 wt. of solution=100 gm
 density of solution=1.2 gm/ml
=>volume of solution=100/1.2=83.3 ml
therefore,
w/v %=(6/83.3)*100
          =7.203 %

Answer 2

Given

• 6gm of glucose is mixed with water(Weight of solute)

• Mixed with 100gm of water(Weight of solution)
• The density of the solution = 1.2

To find

Weight/ volume of the solution of w/v %

Solution

The solution to the above problem can be easily found using the equation for mass concentration

The solution to the above problem is as follows

We know that the equation for w/v% = $\frac{Weight of .solute}{ Total volume.of the solution} *`100$

So First we have to find the volume of the solution =  $\frac{Weight of the solution}{Density of the solution}$

We get it as  $\frac{100}{1.2}$ = 83.3ml

So now we calculate w/v =  $\frac{6}{83.3}*100$ = 7.202881152460984

So the w/v % of the solution =7.202881152460984

Extra point

By approximation, we get the answer as 7.203 %